1: This is correct because m∠GHJ is less than 90°, which means it is acute. To help you remember this, think of the word "cute" in acute, and relate that to small. Small angle=cute size=acute angle
2: The correct answer is Obtuse. This is because the angle is larger than 90°. To help you remember this think of the word obese, which sounds similar to obtuse. Obese means very large, so the very large angle is obtuse.
Hope that helps!
